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A033251 Primes of form x^2+79*y^2. 3
79, 83, 179, 223, 317, 397, 479, 541, 563, 677, 727, 757, 811, 863, 907, 941, 967, 1103, 1277, 1289, 1433, 1489, 1523, 1553, 1867, 1889, 1979, 1993, 1997, 2011, 2039, 2311, 2341, 2383, 2459, 2551, 2579 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Also primes of the form x^2-xy+20y^2 with x and y nonnegative. - T. D. Noe, May 08 2005

REFERENCES

David A. Cox, "Primes of the Form x^2 + n y^2", Wiley, 1989.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

MATHEMATICA

QuadPrimes[1, 0, 79, 10000] (* see A106856 *) Note: the original QuadPrimes had a bug which could sometimes give wrong answers. This sequence should be checked (unless the coefficient of xy in the quadratic form is zero, in which case QuadPrimes gives correct answers). - N. J. A. Sloane, Jun 04 2014

CROSSREFS

Sequence in context: A064991 A051326 A033399 * A015984 A235227 A039544

Adjacent sequences:  A033248 A033249 A033250 * A033252 A033253 A033254

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified July 25 09:00 EDT 2014. Contains 244900 sequences.